Fan speed wall control



FIG. 1 is a perspective view of the fan speed wall control.

FIG. 2 is a front view of the fan speed wall control; and,

FIG. 3 is a side view of the fan speed wall control.

The broken lines in the drawings depict portions of the fan speed wall control that form no part of the claim. 

CLAIM The ornamental design for a fan speed wall control, as shown and described. 